Weather forecast for 10 daysMount Vernon, IL
Weather forecast for the weekend
Sunday Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSE 144°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:07 am CDT
- Sunset: 6:13 pm CDT
- details ▼
On Sunday, October 18, sunshine will likely continue with scattered clouds at most.
Substantial temperature fluctuations from a high of a comfortable 66.2°F to a low of a cold 37.4°F are forecasted.
Tomorrow's high is forecasted to coincide with the typical October maximum of 66.4°F.
Sunrise will be at 7:07 am and sunset at 6:13 pm; tomorrow's daylight will last for 11h and 6min.
Substantial temperature fluctuations from a high of a comfortable 66.2°F to a low of a cold 37.4°F are forecasted.
Tomorrow's high is forecasted to coincide with the typical October maximum of 66.4°F.
Sunrise will be at 7:07 am and sunset at 6:13 pm; tomorrow's daylight will last for 11h and 6min.
10-day overview
Daily temperatures
Warmest day: Sunday 25.10. 81°C.
Coldest day: tomorrow 66°C.
Coldest day: tomorrow 66°C.
Chance of precipitation
Highest chance: 5%.
Long-term weather forecast
- Saturday
- Oct 17, 2026
- min.
- 36°F
Clear
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 1mphESE 102°
- Humidity: 86%
- UV index: 0
- Sunrise: 7:06 am CDT
- Sunset: 6:15 pm CDT
- details ▼
- Sunday
- Oct 18, 2026
- 66°F
- 37°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 7mphSE 144°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:07 am CDT
- Sunset: 6:13 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 73°F
- 41°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 3mphSSE 156°
- Humidity: 50%
- UV index: 5
- Sunrise: 7:08 am CDT
- Sunset: 6:12 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 73°F
- 41°F
Partly Cloudy
- Precip. probability: 4%
- Precipitation: 0"
- Wind: 4mphENE 74°
- Humidity: 47%
- UV index: 5
- Sunrise: 7:09 am CDT
- Sunset: 6:11 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 77°F
- 41°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 2mphESE 119°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:10 am CDT
- Sunset: 6:09 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 77°F
- 43°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 4mphENE 74°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:11 am CDT
- Sunset: 6:08 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 77°F
- 46°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphESE 102°
- Humidity: 49%
- UV index: 4
- Sunrise: 7:12 am CDT
- Sunset: 6:07 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 79°F
- 46°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSE 137°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:13 am CDT
- Sunset: 6:05 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 81°F
- 48°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 6mphSSW 193°
- Humidity: 46%
- UV index: 4
- Sunrise: 7:14 am CDT
- Sunset: 6:04 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 79°F
- 46°F
Partly Cloudy
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 5mphS 178°
- Humidity: 47%
- UV index: 4
- Sunrise: 7:15 am CDT
- Sunset: 6:03 pm CDT
- details ▼
Weather models show that a combination of mostly clear and gloomy weather is expected.
Rain is not predicted in Mount Vernon in the upcoming days.
Expect a substantial fluctuation in daytime highs in the next ten days. Highs will range from 66.2°F to 80.6°F, while the difference in minimum temperatures will be also substantial, as the lowest temperatures will be recorded between 35.6°F and 48.2°F.
With the highest temperature of 80.6°F, next Sunday will be the warmest day; expect the coldest day on Sunday with a high of 66.2°F.
Rain is not predicted in Mount Vernon in the upcoming days.
Expect a substantial fluctuation in daytime highs in the next ten days. Highs will range from 66.2°F to 80.6°F, while the difference in minimum temperatures will be also substantial, as the lowest temperatures will be recorded between 35.6°F and 48.2°F.
With the highest temperature of 80.6°F, next Sunday will be the warmest day; expect the coldest day on Sunday with a high of 66.2°F.
Updated: Oct 18, 2026 @ 01:17:15 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
Frequently asked questions
Tomorrow, expect bright skies and plenty of sunshine.
Tomorrow, the maximum temperature will be 66.2°F, while the minimum temperature will be 37.4°F.
The maximum temperature will be in line with the average highest temperature of 66.4°F in October. The lowest temperature will be significantly lower than the average low of 49.1°F.
The maximum temperature will be in line with the average highest temperature of 66.4°F in October. The lowest temperature will be significantly lower than the average low of 49.1°F.
On Sunday, in Mount Vernon, sunrise will be at 7:07 am and sunset at 6:13 pm (CDT).
Tomorrow, the daylight will last for 11h and 6min.
